/* ========================================
   CSI Crew Calculator - Premium Theme System
   ======================================== */

/* CSS Custom Properties for Theming */
:root {
    /* Light Theme (Default) */
    --primary-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --secondary-gradient: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    --accent-gradient: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
    --success-gradient: linear-gradient(135deg, #11998e 0%, #38ef7d 100%);
    
    /* Colors */
    --primary-color: #667eea;
    --primary-dark: #5a67d8;
    --primary-light: #a3bffa;
    
    --bg-primary: #f8fafc;
    --bg-secondary: #ffffff;
    --bg-tertiary: #f1f5f9;
    --bg-glass: rgba(255, 255, 255, 0.8);
    
    --text-primary: #1a202c;
    --text-secondary: #4a5568;
    --text-muted: #718096;
    --text-light: #a0aec0;
    
    --border-color: #e2e8f0;
    --border-light: #edf2f7;
    
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 40px rgba(0, 0, 0, 0.15);
    --shadow-glow: 0 0 30px rgba(102, 126, 234, 0.3);
    
    /* Glass Effect */
    --glass-bg: rgba(255, 255, 255, 0.7);
    --glass-border: rgba(255, 255, 255, 0.3);
    --glass-blur: blur(10px);
    
    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
    
    /* Border Radius */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --radius-full: 9999px;

    /* Integrated Variables from style.css */
    --bg-color: #f8fafc;
    --sidebar-bg: #ffffff;
    --text-color: #1e293b;
}

/* ========== Global Styles ========== */

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Cairo', 'Inter', 'Segoe UI', system-ui, -apple-system, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    transition: background var(--transition-normal), color var(--transition-normal);
}

/* ========== Premium Navbar ========== */

.navbar {
    background: var(--glass-bg);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border-bottom: 1px solid var(--glass-border);
    position: sticky;
    top: 0;
    z-index: 1000;
    padding: 0.75rem 0;
    transition: all var(--transition-normal);
}

.navbar .container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 2rem;
}

/* Logo Styling */
.logo-container {
    display: flex;
    align-items: center;
    gap: 12px;
    text-decoration: none;
}

.logo-image {
    height: 60px;
    width: auto;
    object-fit: contain;
    transition: transform var(--transition-normal);
}

.logo-image:hover {
    transform: scale(1.05);
}

.logo-text {
    font-weight: 800;
    font-size: 1.4rem;
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* Navigation Links */
.nav-links {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.nav-links a {
    text-decoration: none;
    color: var(--text-secondary);
    padding: 0.6rem 1.2rem;
    border-radius: var(--radius-md);
    font-weight: 500;
    font-size: 0.95rem;
    transition: all var(--transition-fast);
    position: relative;
    overflow: hidden;
    /* Enable Icon + Text layout */
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

/* Underline Animation (existing) */
.nav-links a::before {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 2px;
    background: var(--primary-gradient);
    border-radius: var(--radius-full);
    transition: width var(--transition-normal);
}

/* Icon for Desktop (New) */
/* We normally hide span on mobile and show icon. 
   On desktop, we want BOTH or at least consistency. 
   Let's enable the icon via ::after on desktop too. */
.nav-links a::after {
    content: attr(data-icon);
    font-size: 1.1rem;
    line-height: 1;
    /* Ensure icon color matches text or is distinct? */
    opacity: 0.9;
}

.nav-links a:hover {
    color: var(--primary-color);
    background: rgba(102, 126, 234, 0.1);
}

.nav-links a:hover::before,
.nav-links a.active::before {
    width: 60%;
}

.nav-links a.active {
    color: var(--primary-color);
    background: rgba(102, 126, 234, 0.08);
    font-weight: 600;
}

/* Theme Toggle Button */
.theme-toggle {
    width: 44px;
    height: 44px;
    border-radius: var(--radius-full);
    background: var(--bg-tertiary);
    border: 2px solid var(--border-color);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    transition: all var(--transition-fast);
    margin-left: 0.5rem;
}

.theme-toggle:hover {
    background: var(--primary-color);
    border-color: var(--primary-color);
    color: white;
    transform: rotate(15deg);
}

/* Language Toggle */
.lang-toggle {
    width: 44px;
    height: 44px;
    border-radius: var(--radius-full);
    background: var(--primary-gradient);
    border: none;
    color: white !important; /* Force white text for <a> tags */
    font-weight: 700;
    font-size: 0.85rem;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    text-decoration: none;
    transition: all var(--transition-fast);
    transition: all var(--transition-fast);
    cursor: pointer;
    box-shadow: var(--shadow-md);
    
    /* Flexbox for centering content (especially for <a> tags) */
    display: inline-flex;
    align-items: center;
    justify-content: center;
    text-decoration: none; /* Remove default underline for <a> */
}

.lang-toggle:hover {
    transform: scale(1.1);
    box-shadow: var(--shadow-glow);
    color: white !important; /* Ensure hover keeps white text */
}

/* ========== Glass Card Component ========== */

.glass-card {
    background: var(--glass-bg);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    transition: all var(--transition-normal);
}

.glass-card:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-2px);
}

/* ========== Premium Buttons ========== */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    border-radius: var(--radius-md);
    font-weight: 600;
    font-size: 0.95rem;
    border: none;
    cursor: pointer;
    transition: all var(--transition-fast);
    text-decoration: none;
}

.btn-primary {
    background: var(--primary-gradient);
    color: white;
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(102, 126, 234, 0.4);
}

.btn-secondary {
    background: var(--bg-tertiary);
    color: var(--text-primary);
    border: 2px solid var(--border-color);
}

.btn-secondary:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
}

.btn-success {
    background: var(--success-gradient);
    color: white;
    box-shadow: 0 4px 15px rgba(17, 153, 142, 0.3);
}

.btn-success:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(17, 153, 142, 0.4);
}

/* ========== Form Elements ========== */

.form-input,
.form-select {
    width: 100%;
    padding: 0.875rem 1rem;
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
    font-size: 1rem;
    font-family: inherit;
    background: var(--bg-secondary);
    color: var(--text-primary);
    transition: all var(--transition-fast);
}

.form-input:focus,
.form-select:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 4px rgba(102, 126, 234, 0.15);
}

.form-input::placeholder {
    color: var(--text-light);
}

.form-select:disabled,
.form-input:disabled {
    background: var(--bg-tertiary);
    color: var(--text-muted);
    cursor: not-allowed;
}

/* ========== Animations ========== */

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

@keyframes slideInRight {
    from {
        opacity: 0;
        transform: translateX(30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
}

.animate-fadeInUp {
    animation: fadeInUp 0.5s ease forwards;
}

.animate-fadeIn {
    animation: fadeIn 0.3s ease forwards;
}

.animate-pulse {
    animation: pulse 2s ease-in-out infinite;
}

/* ========== Utility Classes ========== */

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 2rem;
}

.text-gradient {
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.text-center { text-align: center; }
.text-right { text-align: right; }

.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }
.mb-4 { margin-bottom: 2rem; }

.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mt-4 { margin-top: 2rem; }

/* ========== Responsive ========== */

@media (max-width: 768px) {
    .navbar .container {
        padding: 0 1rem;
    }
    
    .logo-text {
        display: none;
    }
    
    .nav-links a {
        padding: 0.5rem 0.8rem;
        font-size: 0.85rem;
    }
    
    .container {
        padding: 0 1rem;
    }
    
    /* Mobile-friendly content grid */
    .content-grid {
        grid-template-columns: 1fr !important;
        gap: 1rem;
    }
    
    .sidebar {
        max-height: 300px;
        overflow-y: auto;
    }
    
    /* Mobile filters */
    .filters .filter-row {
        flex-direction: column;
    }
    
    .form-input,
    .form-select,
    .btn {
        width: 100%;
    }
    
    /* Mobile table */
    #items-table-container {
        overflow-x: auto;
    }
    
    table {
        font-size: 0.85rem;
    }
    
    th, td {
        padding: 0.5rem;
    }
}

@media (max-width: 480px) {
    .nav-links a span {
        display: none;
    }
    
    .nav-links a::after {
        content: attr(data-icon);
        font-size: 1.2rem;
    }
}

/* ========== Comprehensive Mobile Responsive Fixes ========== */

@media screen and (max-width: 768px) {
    
    /* 1. Fix Grid Layout */
    .content-grid {
        grid-template-columns: 1fr !important;
        gap: 1rem;
    }
    
    /* 2. Hide Sidebar or Make it Collapsible */
    .sidebar {
        position: relative;
        width: 100%;
        max-height: 250px;
        overflow-y: auto;
        order: 2;
    }
    
    .results-area {
        order: 1;
    }
    
    /* 3. Fix Table Overflow */
    #items-table-container {
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
    }
    
    table {
        min-width: 600px;
        font-size: 0.85rem;
    }
    
    th, td {
        padding: 0.5rem;
        white-space: nowrap;
    }
    
    /* 4. Fix Search Filters */
    .search-bar,
    .filter-row,
    .filters .filter-row {
        flex-direction: column !important;
        gap: 0.5rem;
    }
    
    .search-bar select,
    .search-bar input,
    .filter-row select,
    .filter-row input,
    .filter-row button {
        width: 100% !important;
        margin-right: 0 !important;
    }
    
    /* 5. Fix Navigation */
    .navbar .container {
        flex-wrap: wrap;
        gap: 0.5rem;
    }
    
    .nav-links {
        width: 100%;
        justify-content: center;
        flex-wrap: wrap;
    }
    
    .nav-links a {
        padding: 0.4rem 0.6rem;
        font-size: 0.8rem;
    }
    
    .nav-links a span {
        display: none;
    }
    
    .nav-links a::after {
        content: attr(data-icon);
        font-size: 1.1rem;
    }
    
    /* 6. Fix Modal on Mobile */
    .modal-content {
        width: 95% !important;
        margin: 10% auto !important;
        padding: 15px !important;
        max-height: 85vh;
        overflow-y: auto;
    }
    
    /* 7. Fix AI Chat Input */
    .input-area,
    .chat-input-container {
        flex-direction: column;
        padding: 0.75rem;
        gap: 0.5rem;
    }
    
    .input-area input,
    .chat-input-container input {
        width: 100% !important;
    }
    
    .input-area button,
    .send-btn,
    .chat-input-container button {
        width: 100% !important;
        padding: 0.75rem !important;
    }
    
    /* 8. Fix Quick Buttons */
    .quick-actions {
        display: grid !important;
        grid-template-columns: repeat(2, 1fr);
        gap: 0.5rem;
        padding: 0.75rem;
    }
    
    .quick-action-btn {
        font-size: 0.75rem;
        padding: 0.5rem;
        text-align: center;
    }
    
    /* 9. Fix Gantt Chart */
    .gantt-container,
    .gantt-content {
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
    }
    
    .gantt-bar {
        flex-direction: column;
        align-items: stretch;
        gap: 0.5rem;
    }
    
    .gantt-bar-label {
        min-width: auto;
        width: 100%;
    }
    
    .gantt-bar-track {
        width: 100%;
    }
    
    /* 10. Fix Planner Container */
    .planner-container {
        grid-template-columns: 1fr !important;
        padding: 0 0.75rem;
        gap: 1rem;
        margin: 1rem auto;
    }
    
    .chat-section,
    .gantt-section {
        height: auto !important;
        min-height: 400px;
        max-height: none;
    }
    
    /* 11. Adjust Font Sizes */
    h1, .page-title {
        font-size: 1.5rem !important;
    }
    
    h2 {
        font-size: 1.25rem !important;
    }
    
    h3 {
        font-size: 1.1rem !important;
    }
    
    .section-header h2 {
        font-size: 1rem !important;
    }
    
    /* 12. Hide Sidebar Ads */
    .ad-sidebar {
        display: none;
    }
    
    .ad-container .ad-responsive {
        height: 60px !important;
    }
    
    /* 13. Fix Container Padding */
    .container {
        padding: 0 0.75rem;
    }
}

/* Extra Small Devices (< 576px) */
@media screen and (max-width: 576px) {
    .quick-actions {
        grid-template-columns: 1fr !important;
    }
    
    table {
        font-size: 0.75rem;
    }
    
    th, td {
        padding: 0.4rem;
    }
    
    .chat-result-table {
        display: block;
        overflow-x: auto;
        white-space: nowrap;
    }
    
    .container {
        padding: 0 0.5rem;
    }
    
    .navbar .container {
        padding: 0 0.5rem;
    }
    
    h1, .page-title {
        font-size: 1.25rem !important;
    }
}

/* ========== Premium Footer ========== */

.site-footer {
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
    padding: 1.5rem 2rem;
    margin-top: auto;
    text-align: center;
}

.footer-content {
    max-width: 1400px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
}

.footer-text {
    color: var(--text-muted);
    font-size: 0.95rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    flex-wrap: wrap;
    justify-content: center;
    direction: ltr; /* Always LTR for English text */
}

.footer-links {
    display: flex;
    gap: 1.5rem;
    margin-top: 0.5rem;
}

.footer-links a {
    color: var(--text-muted);
    text-decoration: none;
    font-size: 0.85rem;
    transition: color var(--transition-fast);
}

.footer-links a:hover {
    color: var(--primary-color);
}

    color: #737373;
}

    color: #ffffff;
}

.footer-heart {
    color: #ef4444;
    font-size: 1.1rem;
    animation: pulse 1.5s ease-in-out infinite;
}

.footer-author {
    font-weight: 600;
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

    color: #737373 !important;
}

    background: #000000;
    border-color: #262626;
}

/* User Custom Overrides for Dark Mode */
    background: #5B6469 !important;
    border-color: #5B6469 !important;
}

    background-color: #98A1A6 !important;
    color: #ffffff !important;
    border: none !important;
}

    filter: brightness(1.1);
}

/* ========== Modal Dark Mode Fix ========== */
    background-color: #1a1a1a !important;
    color: #ffffff !important;
    border-color: #404040 !important;
}

    color: #e5e5e5 !important;
}

    color: #ffffff !important;
}

    color: #a3a3a3 !important;
}

    color: #ffffff !important;
}

    color: #a3a3a3 !important;
}

    background: #262626 !important;
    border-color: #404040 !important;
}

    color: #ffffff !important;
}

    color: #a3a3a3 !important;
}
/* Premium Reset Button (3D Pill Style) */
.btn-premium-reset {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    background: linear-gradient(145deg, #ffffff, #e6e6e6);
    border: 1px solid #d1d5db;
    border-radius: 50px; /* Pill shape */
    padding: 0.5rem 1rem;
    color: #4b5563; /* Slate 600 */
    font-size: 0.9rem;
    font-weight: 700;
    box-shadow: 
        4px 4px 8px #bebebe, 
        -4px -4px 8px #ffffff;
    transition: all 0.2s ease;
    cursor: pointer;
    text-decoration: none;
    min-width: 100px;
}

.btn-premium-reset:hover {
    background: linear-gradient(145deg, #e6e6e6, #ffffff);
    color: #2563eb; /* Blue 600 */
    box-shadow: 
        2px 2px 4px #bebebe, 
        -2px -2px 4px #ffffff;
    transform: translateY(1px);
    border-color: #3b82f6;
}

.btn-premium-reset:active {
    box-shadow: inset 2px 2px 5px #bebebe, inset -2px -2px 5px #ffffff;
}

.btn-premium-reset i {
    font-size: 1rem;
    color: #3b82f6;
    transition: transform 0.4s ease;
}

.btn-premium-reset:hover i {
    transform: rotate(-180deg);
}

/* Dark Mode Override for Reset Button */
    background: linear-gradient(145deg, #1e293b, #0f172a);
    border-color: #334155;
    color: #cbd5e1;
    box-shadow: 
        4px 4px 8px #0b1120, 
        -4px -4px 8px #2d3d56;
}

    color: #60a5fa;
    background: linear-gradient(145deg, #0f172a, #1e293b);
    box-shadow: 
        2px 2px 4px #0b1120, 
        -2px -2px 4px #2d3d56;
    border-color: #60a5fa;
}

    box-shadow: inset 2px 2px 5px #0b1120, inset -2px -2px 5px #2d3d56;
}